diff --git a/pipreqs/mapping b/pipreqs/mapping
index bb4d36f..46cca29 100644
--- a/pipreqs/mapping
+++ b/pipreqs/mapping
@@ -606,6 +606,7 @@ dogshell:dogapi
 dot_parser:pydot
 dot_parser:pydot2
 dot_parser:pydot3k
+dotenv:python-dotenv
 dpkt:dpkt_fix
 dsml:python_ldap
 durationfield:django_durationfield
@@ -1119,4 +1120,4 @@ z3c:z3c.relationfield
 z3c:z3c.traverser
 z3c:z3c.zcmlhook
 zmq:pyzmq
-zopyx:zopyx.textindexng3
\ No newline at end of file
+zopyx:zopyx.textindexng3